Finally got a chance to work on the sud today !!!
i have been collecting the bits and bobs to do the "standard" brake upgrade , vectra callipers and 164 t spark discs.
i picked the discs up this morning - had to have the inner edge machined to clear the hub, it was nice to bolt it all up and see it fitted.
Need to make the proper 6mm carrier spacer, as its just there on two washers, and need to get longer bolts for the caliper carrier, but the most important thing is i know it all clears the wheel and looks sensible.
i think its about the best im going to get under 14" wheels!
if you need a quick east upgrade, i can confirm its all pretty straight forward to do!
all info to do it has been posted on here, so many thanks to the people who done it first and shared the info